Details Of Faults And Solutions - Kruger Ecowatt K320 Series Operation Manual

Ecowatt Drive K320 series
®

7.5.1 Details of faults and solutions

Fault
Fault type
code
Inverter unit
OUt1 Phase-U
protection
Inverter unit
OUt2 Phase-V
protection
Inverter unit
OUt3 Phase-W
protection
Over-voltage
OV1 during
acceleration
Over-voltage
OV2 during
deceleration
Over-voltage
during
OV3 constant
speed
running
Over-current
OC1 during
acceleration
Over-current
OC2 during
deceleration
Over-current
during
OC3 constant
speed
running
Bus
UV undervoltage
fault
Possible cause
Acceleration is too fast;
IGBT module is damaged;
Misacts caused by interference;
drive wires are poorly connected ;
To-ground short circuit occurs
Exception occurred to input
voltage;
Large energy feedback;
Lack of braking units;
Dynamic brake is not enabled
Acceleration is too fast;
Grid voltage is too low;
Inverter power is too small;
Load transient or exception
occurred;
To-ground short circuit or output
phase loss occur;
Strong external interference
sources;
Overvoltage stall protection is not
enabled
Grid voltage is too low;
Overvoltage stall protection is not
enabled
Increase acceleration time;
Replace the power unit;
Check drive wires;
Check whether there is strong
interference surrounds the
peripheral equipment
Check input power;
Check whether load
deceleration time is too short; or
the motor starts during rotating;
Install dynamic braking units;
Check the setup of related
function codes
Increase acceleration
/deceleration time;
Check input power;
Select the VFD with larger
power;
Check if the load is short
circuited (to-ground short circuit
or line-to-line short circuit) or
the rotation is not smooth;
Check the output wiring;
Check if there is strong
interference;
Check the setup of related
function codes.
Check grid input power;
Check the setup of related
function codes
-250-
Troubleshooting
Solution